odhcpd: Stack buffer overflow in DHCPv6 IA reply serialization (2 independent sites)

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-53921 · Microsoft / collected KEV context

cve-program · CVE-2026-53921

• https://github.com/openwrt/odhcpd/security/advisories/GHSA-7fwx-hhrg-3496
• https://github.com/openwrt/odhcpd/commit/0320032ae313452f3c8cb8725c621dd06c36dc03
• https://github.com/openwrt/odhcpd/commit/03dacc23356b5789842b9d1bba0200fd005e35f3
• https://github.com/openwrt/odhcpd/commit/2a42d34c3615e2449ca273f673eee7c429d819a9
• https://github.com/openwrt/odhcpd/commit/6634b7a3c79c41a27687925c98c35c8aea2f2b5a
• https://github.com/openwrt/odhcpd/commit/d168c27fb6a55a07ac4c888e09ff2f41e263d7b7
• https://github.com/openwrt/odhcpd/commit/d329a15413387027453644cd363dca06ade28328

• odhcpd: Stack buffer overflow in DHCPv6 IA reply serialization (2 independent sites) · Newly collected advisory · 23 Oct 2026